New old stock, never used 19" 6-Slot Card Rack. These are 19-inch rackmount card cage (or subrack/chassis) custom fabricated for the MICON C2 distributed control system, a modular platform from the late 1980s/1990s used for process control in applications like petrochemical plants, power generation, compressors, boilers, and energy management. These systems featured plug-in cards for relays (e.g., C2-K series like C2-K15D or C2-K16D), I/O modules, and instrumentation, with the cage providing structural support, ventilation through perforations, and secure mounting via captive screws and side angles for standard rack integration.Powell acquired or integrated MICON's technology around that era, and while the C2 line is legacy (now often seen in refurbished parts markets), it's still supported via third-party OPC servers for modern integration with SCADA or other automation software. The 106mm depth and 6-slot design suggest it's for compact installations, likely holding vertical cards with backplane connections.